An internal Apple document distributed to Apple Authorized Service Providers and obtained by MacGénération and MacRumors confirms that there’s a membrane under the keyboard to “prevent debris from entering the butterfly mechanism”. This is the first time Apple acknowledges that the third generation butterfly keyboard tries to fix unreliability issues.

“The keyboard has a membrane under the keycaps to prevent debris from entering the butterfly mechanism. The procedure for the space bar replacement has also changed from the previous model,” the internal document says.

When Apple introduced the updated MacBook Pro, the company told everyone that the keyboard had been updated for quieter typing. But iFixit found out that the company actually added thin silicon barriers under each keycap.

It’s clear that Apple didn’t want to publicly state that there is a reliability issue with its recent 12-inch MacBook and MacBook Pro models. The company doesn’t want to fuel those lawsuits.

But if you’ve been using a MacBook Pro or a 12-inch MacBook, you know that the butterfly keyboard isn’t ideal. While some people love typing with it, the main issue is that it’s not reliable. Sometimes, keys become stuck, you can’t use a letter, or it inserts two letters every time you press that key.

Even worse, if you try to bring it to an Apple Store to get it fixed, it’s an expensive process that involves replacing a good chunk of the computer. Dust, sand or hair can render your computer unusable.

It’s still too early to say if the 2018 MacBook Pro is more reliable. But Apple needs to update the 12-inch MacBook right away because it’s outrageous that they still sell a laptop with a broken keyboard.